;;;; compiler.test --- tests for the compiler      -*- scheme -*-
;;;; Copyright (C) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
;;;; 
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;; 
;;;; This library is distributed in the hope that it will be useful,
;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;;;; Lesser General Public License for more details.
;;;; 
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

(define-module (tests compiler)
  #:use-module (test-suite lib)
  #:use-module (test-suite guile-test)
  #:use-module (system base compile)
  #:use-module ((system vm loader) #:select (load-thunk-from-memory))
  #:use-module ((system vm program) #:select (program-sources source:addr)))

(define read-and-compile
  (@@ (system base compile) read-and-compile))



(with-test-prefix "basic"

  (pass-if "compile to value"
    (equal? (compile 1) 1)))


(with-test-prefix "psyntax"

  (pass-if "compile uses a fresh module by default"
    (begin
      (compile '(define + -))
      (eq? (compile '+) +)))

  (pass-if "compile-time definitions are isolated"
    (begin
      (compile '(define foo-bar #t))
      (not (module-variable (current-module) 'foo-bar))))

  (pass-if "compile in current module"
    (let ((o (begin
               (compile '(define-macro (foo) 'bar)
                        #:env (current-module))
               (compile '(let ((bar 'ok)) (foo))
                        #:env (current-module)))))
      (and (macro? (module-ref (current-module) 'foo))
           (eq? o 'ok))))

  (pass-if "compile in fresh module"
    (let* ((m  (let ((m (make-module)))
                 (beautify-user-module! m)
                 m))
           (o  (begin
                 (compile '(define-macro (foo) 'bar) #:env m)
                 (compile '(let ((bar 'ok)) (foo)) #:env m))))
      (and (module-ref m 'foo)
           (eq? o 'ok))))

  (pass-if "redefinition"
    ;; In this case the locally-bound `round' must have the same value as the
    ;; imported `round'.  See the same test in `syntax.test' for details.
    (let ((m (make-module)))
      (beautify-user-module! m)
      (compile '(define round round) #:env m)
      (eq? round (module-ref m 'round)))))


(with-test-prefix "current-reader"

  (pass-if "default compile-time current-reader differs"
    (not (eq? (compile 'current-reader)
              current-reader)))

  (pass-if "compile-time changes are honored and isolated"
    ;; Make sure changing `current-reader' as the side-effect of a defmacro
    ;; actually works.
    (let ((r     (fluid-ref current-reader))
          (input (open-input-string
                  "(define-macro (install-reader!)
                     ;;(format #t \"current-reader = ~A~%\" current-reader)
                     (fluid-set! current-reader
                                 (let ((first? #t))
                                   (lambda args
                                     (if first?
                                         (begin
                                           (set! first? #f)
                                           ''ok)
                                         (read (open-input-string \"\"))))))
                     #f)
                   (install-reader!)
                   this-should-be-ignored")))
      (and (eq? ((load-thunk-from-memory (read-and-compile input)))
                'ok)
           (eq? r (fluid-ref current-reader)))))

  (pass-if "with eval-when"
    (let ((r (fluid-ref current-reader)))
      (compile '(eval-when (compile eval)
                  (fluid-set! current-reader (lambda args 'chbouib))))
      (eq? (fluid-ref current-reader) r))))


(with-test-prefix "procedure-name"

  (pass-if "program"
    (let ((m  (make-module)))
      (beautify-user-module! m)
      (compile '(define (foo x) x) #:env m)
      (eq? (procedure-name (module-ref m 'foo)) 'foo)))

  (pass-if "program with lambda"
    (let ((m  (make-module)))
      (beautify-user-module! m)
      (compile '(define foo (lambda (x) x)) #:env m)
      (eq? (procedure-name (module-ref m 'foo)) 'foo)))

  (pass-if "subr"
    (eq? (procedure-name waitpid) 'waitpid)))


(with-test-prefix "program-sources"

  (with-test-prefix "source info associated with IP 0"

    ;; Tools like `(system vm coverage)' like it when source info is associated
    ;; with IP 0 of a VM program, which corresponds to the entry point.  See
    ;; also <http://savannah.gnu.org/bugs/?29817> for details.

    (pass-if "lambda"
      (let ((s (program-sources (compile '(lambda (x) x)))))
        (not (not (memv 0 (map source:addr s))))))

    (pass-if "lambda*"
      (let ((s (program-sources
                (compile '(lambda* (x #:optional y) x)))))
        (not (not (memv 0 (map source:addr s))))))

    (pass-if "case-lambda"
      (let ((s (program-sources
                (compile '(case-lambda (()    #t)
                                       ((y)   y)
                                       ((y z) (list y z)))))))
        (not (not (memv 0 (map source:addr s))))))))

(with-test-prefix "case-lambda"
  (pass-if "self recursion to different clause"
    (equal? (with-output-to-string
              (lambda ()
                (let ()
                  (define t
                    (case-lambda
                      ((x)
                       (t x 'y))
                      ((x y)
                       (display (list x y))
                       (list x y))))
                  (display (t 'x)))))
            "(x y)(x y)")))

(with-test-prefix "limits"
  (define (arg n)
    (string->symbol (format #f "arg~a" n)))

  ;; Cons and vector-set! take uint8 arguments, so this triggers the
  ;; shuffling case.  Also there is the case where more than 252
  ;; arguments causes shuffling.

  (pass-if "300 arguments"
    (equal? (apply (compile `(lambda ,(map arg (iota 300))
                               'foo))
                   (iota 300))
            'foo))

  (pass-if "300 arguments with list"
    (equal? (apply (compile `(lambda ,(map arg (iota 300))
                               (list ,@(reverse (map arg (iota 300))))))
                   (iota 300))
            (reverse (iota 300))))

  (pass-if "300 arguments with vector"
    (equal? (apply (compile `(lambda ,(map arg (iota 300))
                               (vector ,@(reverse (map arg (iota 300))))))
                   (iota 300))
            (list->vector (reverse (iota 300)))))

  (pass-if "0 arguments with list of 300 elements"
    (equal? ((compile `(lambda ()
                         (list ,@(map (lambda (n) `(identity ,n))
                                      (iota 300))))))
            (iota 300)))

  (pass-if "0 arguments with vector of 300 elements"
    (equal? ((compile `(lambda ()
                         (vector ,@(map (lambda (n) `(identity ,n))
                                        (iota 300))))))
            (list->vector (iota 300)))))
